均以較常用的字義來說明舉例除了少部份的字在某種情況下可替換使用絕大多數的字在使用情境上還是有許多不同同時務必注意不同字前後搭配的字詞是有特定的也就是所謂的collocation (即方框內的) occasion (n.) [C] 場合 I’ve seen her with them on several occasions.I met that guy on an earlier occasion.My husband is saving this bottle of champagne for a special occasion. state (n.) [C] 在某個時間點某人或某物所處於的精神、情緒、物理的狀況a. Sb/Sth is in a bad/good etc. state (此時可和 condition 替換使用)The roads are in a terrible state after the tsunami disaster. (路況的物理狀況很不好)Her emotional state has been unstable since she heard about the bad news. b. state of mind = the way you feel 內心(感受)狀態The divorce has left him in a distressed state of mind. condition (n.)a. (參上述可和 state 替換使用的例句)b. working/driving/living etc. conditions (用複數表示:會影響人生活品質的工作、生活環境等)c. freezing /stormy/icy conditions (用複數表示: 天氣較嚴峻的狀況) situation (n.) [C] 在特定時間、地點綜合所有事情發生的狀況 (即情況)a. in the present situation 在目前的狀況; the economic/political/financial situation經濟、政治、金融情況b. a win-win situation 雙贏; a no-win situation 雙輸 circumstance (n.) 常以複數表示a. under (in) the circumstances 某一特別情況發生了而須採取某種行動或做決定His wife now wanted to return to him, but he wouldn't have taken her back now under the circumstances.No, he really isn't my type. But under the circumstances, I don't have the luxury of choosing my type.b. under (in) no circumstances 強調某事絕對不可發生Under no circumstances are you to leave the house because the murderer is still at large.